Microfluidic Sensor for Cultural Heritage Analyte Detection
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Solution Overview
Problem
Current technologies lack sensors capable of continuously monitoring specific analytes, such as ammonia, chlorides, nitrates, and sulphates, directly on the surface of cultural heritage objects, which are essential for effective conservation and restoration, as existing solutions are either too complex or not designed for in-situ monitoring.
Innovation Solution
A microfluidic sensor system comprising a contact surface with an inlet for fluid entry, a polymer matrix reservoir containing a reactive substance that changes color upon analyte detection, and microfluidic ducts to conduct fluids from the object's surface to the reservoir, allowing for visual or spectrometric detection of analytes, enabling continuous monitoring of multiple degradation factors on small, flexible devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If colorimetric detection systems are used to detect analytes, then detection capability is achieved, but device complexity and cost increase due to receptacles, pumps, valves and detector modules
Solution Approach 1:
The patent extracts the essential detection function from complex colorimetric systems by removing receptacles, pumps, valves and detector modules. Only the reactive substance and its color change response to analytes are retained, creating a simplified sensor that achieves detection capability without the complexity of fluid handling and electronic detection systems.
Solution Approach 2:
The patent employs a disposable sensor design where the reactive substance is contained in a simple support structure. The sensor is intended for single use or limited use, eliminating the need for complex, expensive, and maintainable detection systems. This approach trades device longevity for simplicity and cost-effectiveness.
2Difficulty of detecting and measuring
If traditional monitoring devices are used, then analyte detection is possible, but portability and ease of use at the contamination site are reduced
Solution Approach 1:
The patent extracts the detection function from laboratory-based equipment and creates a portable field device. By removing the need for complex instrumentation and reducing the sensor to its essential reactive components, the system becomes easily transportable and operable at contamination sites without requiring laboratory infrastructure.
Solution Approach 2:
The sensor is designed to be self-contained and self-operating. The reactive substance automatically responds to analytes upon contact, eliminating the need for external power sources, control systems, or complex operation procedures. This makes the device extremely easy to use in field conditions.
3Productivity
If sensors are designed for in-situ monitoring on cultural heritage objects, then real-time detection is achieved, but device size and flexibility are compromised
Solution Approach 1:
The patent extracts the monitoring function from bulky traditional sensors and creates a miniaturized device. By retaining only the essential reactive substance and support structure, the sensor achieves real-time detection capability in a compact form factor suitable for placement on cultural heritage objects with complex geometries.
Solution Approach 2:
The sensor employs a flexible support structure that can conform to the surfaces of cultural heritage objects. This thin, adaptable design allows the sensor to be placed on objects with complex geometries while maintaining its real-time detection capability, resolving the conflict between monitoring effectiveness and physical adaptability.
4Difficulty of detecting and measuring
If complex colorimetric systems are deployed, then analyte detection is achieved, but cost and ease of manufacture increase
Solution Approach 1:
The patent extracts the detection essence from complex colorimetric systems by removing expensive components like detector modules and fluid handling systems. The simplified design using only reactive substances on simple supports dramatically reduces manufacturing complexity and cost while preserving analyte detection accuracy through the inherent color change response.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The microfluidic sensor system allows for autonomous, real-time monitoring of analytes on cultural heritage objects, providing a cost-effective, portable, and easy-to-use solution for detecting degradation factors, even in complex geometries, with the ability to monitor multiple analytes simultaneously and respond quickly to changes in analyte concentrations.
Implementation Method 1
The behaviour of fluids on the microscale may differ from macrofluids in factors such as surface tension, energy dissipation and the fluidic resistance
Implementation Method 2
a reactive substance which is configured to change colour when it enters into contact with at least one analyte present in the fluids emitted by the surface of the object
Data Source
AI summary
A microfluidic sensor for the detection of analytes in objects includes a contact surface that may be attached to a surface of the object, an inlet hole in the contact surface for the entry of fluids emitted by the object, and a first reservoir which stores an ionic fluid in the form of a polymer matrix. The polymer matrix includes a reactive substance which changes colour when it enters into contact with the analytes of the fluids emitted by the object. It further includes at least one first microfluidic duct which connects the inlet hole to the first reservoir. A system for the detection of analytes, a method for the manufacture of the microfluidic sensor and the use of the microfluidic sensor for the detection of analytes in works of art are also related.